Practice cut and paste below.

Put your cursor in the bottom box on the left & click once.

Hold down the left mouse button* and scroll across the words (they'll turn blue) then release mouse button.

Click on EDIT on the toolbar (top left), and then click on COPY in the drop-down menu

Move cursor to bottom box on the right, & click once

Click on EDIT on the toolbar (top left), and then click on PASTE in the drop-down menu

Repeat as many times as you want

* right click mouse button if you use a left-handed mouse.